I don't have to. Your claim is that an "uncreated creator" did it all, so you're the one that needs to support the claim.
Secondly, I don't know "how stuff got here". Pre-Big Bang cosmology is not a field I'm particularly conversant with I've got a fuzzy, layman's understanding of the rapid expansion of space time post the Planc-epoch, the formation of Baryonic matter and the development of the macro-scale universe.
My absence of an explanation does not advance your hypothesis one iota though. Until you can provide valid, supporting evidence for your claim of an "uncreated creator" - instead of pure argument with assertion - I'm fine with "I don't know".
I would note though, that at no point in history have we ever discovered a supernatural explanation that overrides an earlier naturalistic explanation.